Nonglaring device for lamps



F. J. DOLE.

NONGLARING DEVICE FOR LAMPS.

APPLICATION FILED NOV 15. 1917.

2 SHEETS-SHEET 1.

Patentedsept. 12,1922.

F. L- DOLE.

NONGLARING DEVICE FOR LAMPS- APPLICATION FILED NOV. 15, I917.

1,429,067. Q PatentedSept.12,19Z2.

2 SHEETS-SHEET 2.

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Application ma lloveinber 1:, 1m. Ierlallo. 202,119.

To all whom it may concern:

Be it known that I, FREDERICK J. Donn, a' citizen of the United Statesresidmg in New Yorkin the county of New York and State ofv ew York, haveinvented certain new and useful Improvements in Nonglar: ing Devices forLamps, of whi h the following is a specification.

This 'invention' relates to an improved lamp-shade particularly adaptedfor use 1n automobile head or search-hghts, to intercept and direct thelight rays, in such manner that while illuminating the madtion of theshade showing three (3) 0 a circular surface close to the vehicle therewill be no transmission of glaring rays, liable to dazzle or bewilderother drivers or persons approac which shade is of checzgvcost and highe ciency, and may be qui y and easily cut to proper size to fit lamps ofwidely variant diameters of aperture.

' My said improved non-glaring lamp-shade is shown described andclaimein the -following specification of which the gaccompanying drawing formsa part, wherein similar letters or numerals of reference,

designate like or uivalentaparts, wherever foliliimll1 throughout t esever views, and in w c Figure 1 is a front view in'pers ctive'of mimproved lamp-shade; and 2, is a si e-view thereof looking toward theleft .of Fig. 1. Figure 3 is a side view in vertical section on anenlarged scale of a 01:-

t e louvers; and F 4 and 5 are central-vertical sectional views show twoforms of my invention each provide with aparabolic .mirror containing alamp, having my improved shade in position thereon; the various kindsofra s transmitted being indicated i by the different forms of theseveral ray indicating lines.

My Improved lamp-shade is usually and preferably formed of pressedglass, but

other transparent material may be used with equal effect.

im roved lamp shade comprises A, having the outer plain circumferentialsecuring-ring portiolne 11,

My said to proper size to fit various'size'so lamps.

' Formed on what is to be the face or outer or front side of theshade-disk A, are a v rismatic louvers 12, usually 56 and preferabyarranged horizontally as plurality of shown, the twofaces of whichareusually and preferably at an angle of :ninet de- (90) one to theother;.,,-the ower aces 13, being inclined outwardly and the u p21-faces 14 inwardly upward, the base 0 t e to the orizontal line of thelouvers.

For the sake of cheapness of construction my im roved form of lamp-shadeis usually forme' of glass-pressed into form in asuitable mold; andwhile the rear face may be ,Eane surfaced as shown in Fig. 4 and in 11lines in Fig. 3, the louverrisms may be longitudinal y p p the back, asindicated in Fig. 5 and by the ri ht-angled dotted-lines at 15 of Fig.3.

triangularly [allowed at risms of the louvers being inclined any eventand of whatever forinmf construction, while the main-body portion of theshade is formed of;

parent glass, the upwardly inwardly inclined faces 14 of each of thelouvers 12,-

are dimmed so as to prevent transmission of glarin light-rays to adistance, while the mwar and downwardly inclined surfaces 13 0 suchlouvers are, left transarent to allow of the transmission of right'diver nt ound re s downward upon the roa way immediate y;in front of themachine, as mdicatedby the full lines in Figs. 4 and 5 the dimmed glowrays being therein in 'cated b the short or round dotted-lines; and t eparallel un'- dimmed distance re s being shown by the dash or elongatedotted-lmes.

The outer annular plane surfaced peripheral securing-ring 11, like thefaces 14 of the louvers is 'dimmed. in any suitable manner among whichmay be covering the same with white or other enamel .ortranslucent glassof yellow or other color, in or in the sec 4 lf desirecl the head-lightas in pling' highly transground.

Fig i 4 may be tilted slightly forward to hold the I claim: I

1. A non-glaring device comprising a plu rality of horizontal louvresarranged one above the other and each provided with an outwardly anddownwardly incl-fined dimmed upper face, and an upwardly and outwardlyinclined freely transparent lower face disposed at an angle of aboutfiOdegrees to the plane of the device.

2. A non-glaring device comprising. a plurality of horizontal louvresarranged one above the other and each providedwith an outwardly anddownwardl' inclined dimmed upper face, and an upwar ly and outwardlyinclined freely transparent lower face disposed at an angle of about 60degrees to the plane of the device, whereby said lower face permits theegress of substantially undimmed horizontal distance rays, and theegrees of substantially undimmed ground downwardly and forwardlydirected rays.

3. A non-glaring device comprising a' plurality of horizontal louvresarranged one above the other and each provided with an outwardly anddownwardl inclined dimmed upper face, and an upwar ly and outwardlyinclined freely transparent lower face disposed at an angle of about 60degrees to the istance rays parallel with the.

said lower face is wide.

a. A non-glaring device comprising a plnrality of horizontal prismaticlouvres ar ranged adjacent one above the other and each 'rovided with anoutwardly and downward y inclined dimmed upper face disposed at an angle'otahout degrees to the plane of said device, and an upwardly andoutwardly inclined freely transparent lower face joining the adjacentupper faces at approximately right angles and disposed at an angle ofabout 60 degrees to said plane, whereby said lower face permits'theegress of substantially undimmed light rays in forward beams of avertical thickness as reat as'half the width of said lower face, an rthe egress of-suhstantially undimmed rays directed downwardly andforwardly in heams as thick as said-lower face is wide.

rnnnnnrcn a. Donn Witnesses:

Gnonen J. lBian'rnns, H. 1'. Smart.

